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Quick Lists
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Bug ID:
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6747051
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Votes
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0
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Synopsis
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Improve code and implicit null check generation for comressed oops
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Category
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hotspot:compiler2
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Reported Against
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Release Fixed
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hs14(b06)
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State
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10-Fix Delivered,
request for enhancement
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Priority:
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4-Low
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Related Bugs
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Submit Date
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10-SEP-2008
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Description
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Currently C2 often generats redundant tests against null:
decode_heap_oop R11,R10
testl R10, R10 # compressed ptr
jeq B75 P=0.000001 C=-1.000000
decode_heap_oop also contains a test of R10 that's not exposed to the optimizer.
Posted Date : 2008-09-10 21:44:29.0
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Work Around
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N/A
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Evaluation
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http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/36ccc817fca4
Posted Date : 2008-09-23 23:57:52.0
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Comments
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PLEASE NOTE: JDK6 is formerly known as Project Mustang
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